Fluid-condensing system



May 6, 1930.-

- G. L. KOTHNY FLUID CONDENSING SYSTEM Filed Oct. 25, 4 Sheets-Sheet 1 ENOOOOO 1 oooooooo wxvooooo r O O p fim 0/ /V. 0 0000000000000 I 0000 0 0 0OO 0 00 00 00 If woo 000 0 0o 00900000050 AAA/ May 6, 1930.

G. L, KOTHNY FLUI'D CONDENSING. SYSTEM 4 Sheets-Sheet 2 Filed 007. 25, 1926 7 mg. l JJ INVENTOR. it," 1;. 5177711 Gaffdan BY ATTORNEY.

y 1930- L. KO I'HNY 1,757,723

I FLUID CONDENSLNG SYSTEM Filed Oct. 23. 1926 4 Sheets-Sheet '3 7 IIIIIII l4 r 3 F 5 z 1 z I F I I i r v 3 5 I N VEN TOR.

ms m

, ATTORNEY.

Patented May 6, 1930 care-s stares GOTTDAI-TK L. KOTHNY, or srRAFron-n, PENNSYLVANIA, ASSIGNOR TO 0. H. WHEELER YFICE MANUFACTURING COMPANY, OF 'PHILADELPHIA, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA.

FLUID-CONDENSING SYSTEM 1 Application filed October 23,1923. "Serial No. 143,567. i

My invention relates to apparatus for condensing a fluid utilized for compressing another non-condensablefiuid, and has particular reference to a fluid comprising steam and air.

In accordance with my invention, there is utilized apparatus comprising a plural ity of ejeotors and a condenser shell containing a plurality of groups of tubes, one of said ejectors discharging the fluid to be condensed through the tubes of one of said groups, the uncondensed fluid thereafter passing around the tubesof another of said groups through which a cooling medium is flowing, to another ejector which further compresses the remaining uncondensed fluid and discharges the same througha third group of tubes, and simultaneouslywith the foregoing operation a cooling' medium, as condensate, is caused to circulate exteriorly ofthe first and third groups of tubes.

7 Further in accordance with my invention, the same condenser shell encloses all of the various groups of tubes and, further, said shell comprises a member detachable there'- from and facing that group of tubes through which the cold water or other cooling medium flows to permit the passage of suitable cleaning apparatus through the tubes, and, more particularly, facing each end of. said group of tubes there is provided a member detach.-

the cleaning. operation. a

In U. 8. Patents Nos. 1,536,539, 1,536,984

able from the shellto more readily facilitate and 1,578,865 there is disclosed condenser structure wherein the steam and air mixture between the first and secondstage ejectors features of construction of the characterhere-- inafter described and: claimed.

For an understanding of my method and fornanillustration of some of the'various forms my apparatus may take, reference is to be had to the accompanying drawing in which: 7 I

Fig. 1 is a vertical sectionalview of a condenser shell constructed in accordance with my invention.

Fig. 2 is a horizontal sectional View of the structure shown in Fig. 1.

Fig. 3 is another horizontalsectional view of the structure illustrated in Fig. 1, taken .on aplane extending horizontally through the top end box.

Fig. 4 is a plan View of-the structure shown in Fig. l.

Fig. 5 is a'vertical sectional viewof a modified form of condenser shell and is taken on the line 5-5 of Fig. 6. r V

Fig. 5 is a plan View of the structure shown inFig.5.

i Fig. 6 is a horizontal viewrpartly in section and partly broken awayof the structure illustrated in Fig. 5.

Fig.. 7

s 'a vertical sectionalview taken throughone of the twin condenser shellsillustrated in Fig. 6 and is taken on the line 7-7 ofIFig. 6. i

Fig. ,7 is ahorizontalsectional view of I an upper end box and is taken on thelines 7 a of Figs. 5 and 7.

Fig. 7 is a horizontal sectional View of a I lower end box and-is taken'on the lines 7 ofFigs.5and7. I i

Fig. 8 is an elevational view,partlyin sec tion of another'form of condenser shell.

Fig. 8 is a plan iew of the condenser structure of Fig. 8. f i

' Fig. 9 is a horizontal sectional View through the condenser shell of Fig- 8. 1

Fig. 10 is another horizontal sectional view of the structure illustrated'in Fig. 8 taken through the upper end box. r

Fig. 11 is a sectional :view taken on line 11- 11 ofcFig. 8. V T Referring to Figs. 1 aud t, at'E there is illustrated the first stage ejector structure of any suitable character mounted upon the 'chest'orbox B of thecondenser structure K, the chest B being divided by the partitions or and g. These chambers have as a common wall the tube sheet or plate It held between the box B and one end of'theshell i of the condenser structure 'K. The lower end of the shell 2' is closed by the plate or tube'sheet j, which forms a wall or closure for the lower chest or box B having the partition or wall/ c dividing it into the chambers Z and n.

Within the shell 71 are the downwardly extending plates or bafiles 0 and 1) whose lower ends are spaced from the tube sheet j. Suitably positioned between the aforesaid baffies 0 and p is the upwardly extending baffle or plate 9 whose upper end is spaced from the ers into the passage 03.

steam and air varying in ratio from one tenth to unity into the chamber 7 and thence downwardly through a group of tubes 7- 0f the inter condenser intothe chamber a. While tube'sheet h, these bafliesor plates dividing the interior of the shell 2' into'four passes in ably vertical tubes 'r,-only few tubesr being tubes 7' are of brass or other suitablematerial and may be secured by ferrules, not shown,

- each of whichis disposed a group of prefer or other well-known means,in the tube sheets handjf As clearly illustrated in Fig. 1, the-first group of tubes 7 connects the chambers g and "a; the second group connectsthe chambers 'n and f; the third group connects the cham- V bers e and Z; and the fourth group connects the chambers Z and d. i

The aforesaid first and second groups'of tubes are those of a so-calledintercondenser or interstage condenser, while the aforesaid third and fourth groupsare those of a so-called after condenser. These inter and aftercondensers are disposed Within the same condenser unit or shell 7 As illustrated in Fig. 3, the chamber 9 is formed in part by the oppositely disposed tube sheets or plates 8 and 2f, the former form'- inga wall or closure for the chest or box B and the latter forming a similar wall or closure for the chest or box B Box B is provided with a wall or partition u dividing it into the chambers o and w into each of-which opens a fluid passage as. Secured in the tube sheets or plates 8 and t are a suitable number of tubes 2,thoseatthe left of partition to, Fig. 3, being in communication with chamber 12 and a passage 00, and those at the right of said partition it being in communication with chamber w and the other passage w, all of said tubes at their other ends being directly in communication with the interior of box 13 If desired, chamber 9 may be provided with the transverse plate or bafile a utilizable for deflecting the mixtureof air and vapors passing upwardly exteriorly ofjthe tubes 2.

The aforesaid ejector structure E is placed in'communication with the chamber fby the tubulardiffuser b Fig.1, and the chamber 9 is connected by apipe, conduit or the like C .through the other passage as in end box B through the passage (1 The air with the remaining uncondensed steam passes from chamber a through the group of tubes 7' leading to chamber g,.-further'condensation of the steammeanwhile occurring until finally the Ton of tubes 1'; After oassin around the t: L

baffle g, the condensate circulates exteriorly of the two groups of'tubes of the after condenserand emerges by way of passage 7. V

t thesame time, cold water, preferablyfrom a separate source, is'supplied to a passage w from whence it flows through a group of. tubes Z on one side of partition u into the box Bflthence into and through in reverse direction the group-of tubes on the other side of said partition 26 and. finally emerges The remaining air and vapor 7 mixture leaves the cold pass condenser or chamber 9 ihe ejector: Edischa-rges a mixture of walls a, b and 0 into the four chambers d, e, f I with the second stage ejector E whichdelivi i by wayof conduit C and passes to ejector E where further compression to atmospheric pressure, more or less, is effected, whereupon the mixture is discharged to the chamber cZ- thence through a group of tubes rofthe after condenser to'the chamber Z from mixture passes upwardly through the other group of tubes 1 of the after condenser to V chamber a and thence by way of passage h less than atmospheric pressure. The temperature of the water'pas'smg through. the tubes 2 usually 1s from ten to twenty-five degrees lower than that of the condensatecirculatingexteriorly of the tubes 1" and, therefore, condensation of the vapors results when they. p'assexteriorly of said" whichthe condensed steam may be withdrawn V throu'gh'ipassage 9 From chamber Z, the

tubes 2. The circulating cooling water, howtubes .2 functionlfess does not destroy the. op-' erabillty of the apparatus as a whole, for,

. ever, is often impure and, therefore, this part manner, as by ferrules, not shown,

ture reaching the second stage eject-or E is somewhat higher than when the cold pass condenser is in operation. This type of-com densing structure is probably not as effective for condensing an air and vapor mixture as that illustrated in the aforesaid patents However, this is more than offset because in the prior art constructions, as exemplified in said patents, the cold waterpasses exteriorly of the tubes, while with my invention'the cold water passesinteriorly of the tubes. In tl e first case the cleaning operation is extremely ditficult, while in the latter it is a simple operation. j

Referring to Figs. 5, 5 6, 7 7 and 7", there is illustrated an arrangement somewhat similar to that described above with the exception that two radojets are arranged on one combined inter and after. condenser with the cold pass condenser arranged inside of the combined after condenser instead of inthe upper heads.

In Fig. 5, at E there is illustrated the first stage eject-or structure of'any suitable character, for Letters Patent No.1,535137, the'ejector structure being mounted upon the chest or box 13* disposed upon thetube sheet a held between the box B and one end of the shells b and C of the condenser structure K The lower end of shells and 0* is closed by the plate or tube sheet (Z which forms a wall or closure for the lower chest or box C As illustrated in Figs. 7 and '7, the portion of box 13* overlying the shell 6* is divided by the partitions or walls 0*, f and 9* into the four chambers h g1, y and 10*. Also, the portion of box C which underlies the shell 72 is divided by the partitions or walls Z and m into the three chambers 91 ,0 and p Vfithin the shell 6* is the downwardly extending plate or ba-fiie whose lower end is spaced from the tube sheet (Z On each side of the aforesaid plate or baffle are disposed the groups of preferably vertical tubes u,

only few tubes a being indicated in the drawing for the sake of clearn ess. As described above with respect to the tubes r of Figs. 1-4:, the tubes a may be of brassor other suitable material and may be secured in any suitable in the tube sheets a and (Z 7 As clearly illustrated in Fig. 7, the 'lirst group of tubes 20* connects the chambers k and 39 the second group connects the chambers p and j; the third group connects the chambers i and 0; the fourth group connects the chambers o and h; and the fifth group connects the chambers h and it.

within the interior space and dividing the example, as illustrated in said U. S.

The aforesaid'first and second groups of tubes are those of aso-called after condenser, while the aforesaid third, fourth and fifth groups are those of a so-called inter condenser or interstage condenser. These i inter and after condensers are disposed within the-same shell 6*.

'As illustrated inFigs. 5 and 6, t-he afore said shells If and c in conjunction with the tube sheets a and (1* definea-n interior space which is entirely closed by the oppositely diS-' posed walls or tube sheets 12 and to supporting the tubes w preferably divided, into a plurality of groups by the oppositely extending bafiles or plates y". Extending vertically same into two'compartment-s is the wall J engaging at its respective upper and lower ends thetube sheets a and (Z Suitably secured to the respective tube sheets 41 and 10 are the boxes a and Z2 theformer comprising the single'partition or wall 0 and the lat-- ter comprising thetwo spaced partitions or walls (Z and 6". Box 6 is provided with the orifice oropening f through which cold water or other coolingmedium is admitted to the topmost group of tubes 02*, Fig. 5, and thereafter circulates, due to the'walls 0' 6 and (Z in series throughthe remaining groups of said tubes 00* and finally emerges orifice in box If. Condensate orother cooling medium is suppliedby way of passage 7L to the inter condenser-and passes exteriorly of the several groups of tubes a in a circuitous path due to the baffle 9 the condensate finally emerging; through the passage Simultaneously, the ejector E functions as well understood in the art to discharge steam and'air into the chamber i from which the mixturepasses downwardly through a. group .of tubes a into the chamber 0 By such action substantial condensation of the steam occurs, the condensate collecting in said chamber 0 passing through passage 9' to chamber a and thence to a suitable destination by way of conduit The air with the remaining uncon densed steam passes upwardly from chamber 0 through a group of by way of tubes 'wto chamber 71, thence downwardly JT" through another group of tubes a to chamber ntfrom which any additional condensate passes byway of conduit 10 Chamber n is in communication by passage Z in tube sheet (Z Figs. 5 and 7 with If;

the chamber containing the cold water tubes 00 and,'accord1ngly, the air and condensed *steam' pass through said chamber exteriorly of said tubes at? along a circuitous path and I finally pass through a passage 172. in tube I sheet a Figs. 5 and 7?, into a chamber a in box B From chamber 12 the mixture passes. through conduit 0 to the second stage ejector Ffof any suitable character; for example, as

into any suitable chamber, usually at atinospheric pressure.

Inaccordance with the form of my inven tion illustrated in Figs. 5, 6, 7 7? and 7 the shell 0 and the structure therewithin are du plicates, respectively, of shell I)? and the a structure enclosed thereby.

Condensate is supplied Iexteriorly of the tubes 24 of shell 0 by way of conduits", preferably branching from conduit 7L5 and emerges from said shell by way of conduit 2? preferably connected with conduit 1?.

The end box C is provided with a transverse wall J Fig. 7", which may be a continuation of wall J but preferably is a separate wall formed integrally with said end box O and extends upwardly into contact with the tube sheet (Z mingling of the respective mixtures of the twin condensers in. the end box O is prevented while, as stated above, the wall J prevents commingling of the mixtures in the pass occupied by the cold Water tubes- Eventually, each mixture passes separately into a chamber a and thence to the suction of the second stage ejector. .The groups of tubes last traversed by the two mixtures communicate with the single chamber y extending above each of the shells b and cflFig. 7.

Referring to Figs. 8, 8 9, 10, and 11, there is illustrateda form of myinvention wherein all of the various groups of tubes are arranged vertically and enclosed within a single condenser shell. 7

To this end, there is provided a shell A whose upper and lower ends are closed by the boxes B and C". Between the flanged extremity of box B .and 1 the} upper end of shell A is disposed a tube sheet a and between the flanged extremity of box C. and the lower end'of said shell is disposed a similar tube sheet 6 As illustrated in Fig. 10, the box B is traversed by the substantially diametrical wall a and one of the compartments thus, formed is subdivided into the chambers (Z 6, f and g by the walls or partitions h, i and j. Opening, respectively, intothe aforesaid chambers d, e, f and g are the tube groups 70 Z", m and 72., each group comprising any suitable number of tubes and the-individual tubes being constructedofany suitable materiah preferably, however, of brass. At thelr lower ends, the tubes of group are in commumcation with those of group I As a result com- 7 etc.

and the tubes of group m communicate with those of group n; However,communication between group k and Z on the one hand and group an) and n on the other hand is pre-- vented by a wall a dividingthe box G into two chambers into one of which opens the The other compartment formed by the aforesaid wall 0 is divided into a plurality of chambers 0 39 g, r ,s -a nd t by the walls or partitions a 6 c, d and e 7 Opening into the chamber 19 is the group of tubes 7".

Opening into the chamber are the groups of tubes 9 and it while into chamber 1 opens the similar groups oftubes i and 7' Chamber 8 corresponds with chamber 12 and hence but one group of tubes 70 opens thereinto.

Box O is provided with a diametrical wall 0 but corresponding generally with wall a in box 13. The compartment thus formed is divided into a plurality of chambers by. walls a 6 0 (i into one of which chambers opens the tube groups 70 and f, while in another opens the tube groups 2' and it, while in still another the tube groups 9 and 7 open.

medium entering the condenser shell through the passage l passes downwardly through tubes 70 upwardly through tubes j, downwardly through tubes 77, upwardly through tubes 7L7, downwardly through tubes 9 upwardly through tubes 7, and thence from the condenser shell by way of passage m.

The shell A of the condenser is also divided intotwo compartments by the substantially diametrical wallor partition 72,, Fig. 9, in one of which compartments are received the aforesaid groups of tubes f, 9 etc., traversed by cold water orthe like, while the other compartmentreceives the groups of tubes k", l,

Condensate enters the last-named compartment by way of passage 0 flows around the tubes Z0 l, m and n preferably along a circuitous path by baffles or plates and emerges by way of passage p The ejector E of any suitable type, for example, as disclosed'in the aforesaid U. S.

Patent No. 1,535,137, simultaneously with the passage of condensate around the tube groups 70", Zf, etc., and the passage of cold water through the tube groups f 9 etc, discharges steam and'air through passage 9 into chamher a Fig. 10, from. whence the mixture passes downwardly through tubes Z into the Accordingly, cold water or other cooling 7 chamber in box C from which any conden- I sate may be withdrawn through a conduit, not

shown. The remaining mixture passes upiL ZJi wardly through tubes is and thence into the chamber 0 which communicates through an openingiin the tube plate a with the compartment containing the'tube groups f, 9

From this'compartment the mixture of air the mixture occurs and thereafter the same is discharged into chamber g? fromivhich' it passes through tubes it -into the chamber in box C from which any condensatemay be withdrawn through a conduit, not shown.

From the aforesaid chamber in box C the mixture passes upwardly through tubes m and then through a suitable vent, shown in dotted line in Fig. 10, leading preferably to the atmosphere. r .eferring to Fig.- 10, the chamberspfi g", r and s are covered or closed by a plate like cover 1, Fig. 8, and the chambersin the box G into which open the tube groups 7", 7,

.h, 71 and k are closed by a similar cover 9".

I-Ieretofore, when the steam and air mixture did not pass directly from the inter.- condenser to the suction of the second stage ejector, such mixture has been caused to pass through a group of tubes around which the cooling medium circulates. Under such circumstances, particularly when the cooling medium consists of dirty water or water containing impurities, as mud, alkaline matter, etc., these tubes'within a short time become encrusted or encased with foreign matter which largely impedes the rapidity of heat transfer from the steam and air mixture, thereby seriously affecting the efficiency-of the apparatus. Moreover, since such foreign matter accumulates exteriorly of the tubes, the removal thereof is an expensive and tedious operation, necessitating the closing down of the entire apparatus.

In contra-distinction by my invention, any foreign matter in the cold water or othercooling medium is deposited interiorly of the tubes thereby rendering it a relatively simple matter to clean the same. Moreover, during the brief cleaning period that is required, the apparatus may be still kept in service, although, as stated above, at such time the efficiency of the system may be reduced.

Obviously, in Fig. 3, the end boxes B and B and in Fig. 5, the end boxes a and b may be readily removed preparatory to cleaning the cold water tubes. Likewise, with respect to the construction illustrated'in Figs. 8 to 11, the plates closing the ends of the shell above and below the cold water tubes may readily be removed to permit the introduction of the tube cleaning apparatus.

It shall be understood that my invention is not limited to ejector apparatus of the twostage type, but that the principles and features thereof may be employed in connection with apparatus utilizing three or more stages, particularly if a cold pass is used for cooling theair vapor mixture leaving the inter condenser. a

What I claim is: I 1. In alfluid condensing system utilizing an ejector, a condenser shell, a plurality of groups oftubes in said shell,.the tubes of one of said groupscommunicating with the discharge of said ejector and passing the fluid to be condensed into a region-around the tubes of another of said groups, and means for passing a cooling medium through the tubes of said last-named group. i

2; In a fluid-condensing system'uti-liz'ing a plurality of ejectors,'a condenser shell, a first group of'tubes in said shell through which oneof said ejectors discharges the fluid to be condensed,-a second group of tubesin said shell, means for passing a cooling medium through the tubes of said second group, and means for passingthe fluid into the space around said second group of tubesf 3. In a fluid-condensing system utilizing a plurality of ejectors, a condenser shell,'a first group of tubes in said-shell through which one of said ejectors discharges the fluid to be condensed, a second group of tubes in said shell, means forpassing a cooling'mediuin through the tubes. of said second group,

means for passing the fluid into the space around said second group of tubes and thence to another of said ejectors, and athird group of tubes through which said last-named ejector discharges. i

l. Ina fluid-condensing systemutilizing a plurality of ejectors, a condenser shell, a first group of tubes in said shell through which one of said ejectors discharges the fluid to becondensed, a second group of tubes in said shell, means for passing a cooling; medium through the tubes of said second group, means for passing the fluid into the space around said second group of tubes and thence to anotherv of said ejectors, a third group of tubes through which said last-named ejector discharges, and means for passing another cooling medium around the tubes of said first and third groups; p

-5. In. a fluid-condensing system utilizing a plurality of ejectors, a condenser shell, a group of tubes in said shell through which one of said ejectors discharges the fluid to be condensed, a connect-ion between said tubes and the suction of another of said ejectors, and a group of tubes through which a cool- 'ing medium flows interposed in said connection. 1

6. In a. fluid-condensing system utilizing. an ejector,-a condenser shell, a plurality of groups of vertical tubes. in said shell, the tubes of one of said. groups communicating with the discharge of said ejector and passing the fluid to be condensed into the region around the tubesof another of said groups,

and means forpassing a coolingmedium through the tubes of said last-named group.

7; In a fluid condensing system utilizing an ejector, a condenser shell, a plurality of groups of vertical tubesin said shell, the tubes of one of said groups communicating with the discharge of-said ejector and passing the fluid to be condensed intothe region around the tubes of another OfSiLlCl groups,

and means for passing a cooling medium in one dlrectlon through some of the tubes of said last-named group and in reverse direction through other tubes of said last-named group.

8. Ina fluid-condensing system utilizing a plurality of ejectors, a condenser shell, a first group of vertical tubes in said shell through which one of said ejectors discharges the fluid to be condensed, a second group'of tubes in said shell, means for passing a cooling me dium through tubes of said second group,

and means for passing the fluid into the space around said second group of tubes.

9. In a fluid-condensing. system utilizing a plurality of ejectors, a condenser shell, a first group of vertical tubes in said shell through which one ofsaid ejectors discharges the fluid to be condensed, afsecond 7 group of vertical tubes insaid shell, means for passing a cooling mediumthrough tubes 7 of said second group, and means for passing the fluid into the space around said second group of tubes.

10. In a fluid-condensing system utilizing a plurality of ejectors, a condenser shell, a

first group of Vertical tubes in said shell through which oneof said ejectors discharges the fluid to be condensed, a second group of vertical tubes in said shell, means for passing a cooling medium through the tubes of said second group, means for passing the fluid .into the space around said second group of tubes and thence to another of said ejectors, a third group of vertical tubes through which said last-named ejector discharges, and means to the interior of said last-named tubes.

12. A condenser unit comprising a shell and a member detachable therefrom, a group of tubes in said shell, means for passing the fluid to be condensed through said tubes, and a second group of tubes in said shellthrough whicha cooling medium flows and around which the fluid passes, said second group of tubes only facing said detachable-member.

13. A condenserunit comprising a shell and amember detachable therefrom, a group of tubes insaid shell, means for passing-the fluid to be condensed through said tubes, and a second group of tubes in the shell facing said detachable member and around which the fluid passes, and means comprising said detachable member for passing a cooling mediumthrough only said second group of tubes.

14. A co'ndenserunit comprising a she1l' and a memberdetachable therefrom, a group of vertical tubes insaid shell, means for passing the fluid to be condensed first through said tubes, and a second group of vertical tubes in said shell through which a cooling medium flows and around which the fluid passes, said second group of tubes only facing said detachable member.

.15. In a fluid-condensing system utilizing I a plurality of'ejectors, a condenser shell, :1

vertical walldividing said shell into plurality of compartments, groups of vertical tubes in one of said compartments through which said ejectors vdischarge the fluid to be condensed,and groups of vertical tubes in another of said compartments around which said mixture passes and through which a cooling medium circulates. r

- 16. In afluid-condensing system utilizing a plurality ofejectors, a condenser shell, a

vertical wall dividing said shell into a plurality of compartments, groups of vertical tubes in one of said compartments through which said ejectors dischargethe fluid to be condensed, and groups of. vertical tubes in anotherofsaid compartments through which a cooling medium circulates and aroundwhich said fluid passes whlle traveling be tween successive ejectors.

GOTTDANK L, KOTHNY.

CERTIFICATE OF CORRECTION.

Patent No. 1,757,723. Granted May 6, 1930, to

GOTTDANK L. KOTHNY.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, line-16, strike out the word "not" and after the word "shown" same line insert the words and numeral in dotted line in Fig. 10.; same page, lines 19 and 20, strike out the words "shown in dotted line in Fig. 10," and insert instead the words and comma not shown,; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of September, A. D. 1930.

M. J Moore,

(Seal) Acting Commissioner of Patents. 

